William Edward Glyn (1859 – March 23, 1939) was a United States–based British male tennis player.

William Glyn from the Staten Island Cricket and B.B.

Club was a finalist in the first U.S. National Championships held in 1881 at the Newport Lawn Tennis Club in Newport, Rhode Island.

En route to the final, he defeated Mr. Rives, Richard Field Conover, W. Gammell Jr., and T. A. Shaw.

In the final he met and was defeated by Richard D. Sears.